64855242 has 24 divisors (see below), whose sum is σ = 145725216. Its totient is φ = 21618252.

The previous prime is 64855237. The next prime is 64855243. The reversal of 64855242 is 24255846.

It is a happy number.

64855242 is a `hidden beast` number, since 64 + 8 + 552 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 64855197 and 64855206.

It is not an unprimeable number, because it can be changed into a prime (64855243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66238 + ... + 67209.

It is an arithmetic number, because the mean of its divisors is an integer number (6071884).

Almost surely, 2^64855242 is an apocalyptic number.

64855242 is an abundant number, since it is smaller than the sum of its proper divisors (80869974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64855242 is a wasteful number, since it uses less digits than its factorization.

64855242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133464 (or 133452 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 64855242 is about 8053.2752343379. The cubic root of 64855242 is about 401.7738759483.

The spelling of 64855242 in words is "sixty-four million, eight hundred fifty-five thousand, two hundred forty-two".